Thousands of supporters of Egypt's embattled president are rallying in the nation's capital in a show of support ahead of what are expected to be massive opposition-led protests on June 30 to demand Mohammed Morsi's ouster.

The president's supporters held Friday prayers in streets surrounding a main mosque in Cairo, close to the presidential palace that in two days will be the focal point of opposition protests.

During Friday's sermon, the cleric warned that if Morsi is ousted "there will be no president for the country" and Egypt will descend into "opposition hell."

The opposition push is rooted in a campaign to collect signatures on a petition calling for Morsi's dismissal and early presidential elections.

The campaign, called "Tamarod," says that it has collected up to 20 million signatures.